150 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, 1892. 



somite almost absent ; the caudal process of the 20tli normal in form ; 

 the sternum bituberulate posteriorly. Legs hairy and elongate. 



$ . Body a little more slender, the keels a little more prominent ; 

 the sternum of the fifth unmodifiedj and the femora of all the legs 

 normal. 



Copulatory feet short ; the basal segment hairy^ the second segment 

 stout and terminating distally in two processes, an external slender, 

 filiform, and curled at the apex, an internal stouter, giving off a short 

 slender lamina on the inner side at its base, strongly curved inwardly 

 in its distal half. 



Length up to 23 mm. 



Several examples from Punduloya ; Mr. Gfreen. 



This species resembles 8t. simplex in having only a transverse dorsal 

 sulcus ; but may at once be recognised by the difference in colouring, 

 in the form of the copulatory apparatus, smaller keels, &c. Moreover 

 in simplex there is present on all the segments except those at the 

 posterior end of the body a conspicuous sub-crescentic crest above 

 the base of the legs — a crest which is entirely absent in Btr. greeni. 

 Strong ylosoma cingalense, Humbert. 

 (PI. i, fig. 5.) 



Loc. cit., pp. 32, 33, pi. iii, fig. 13, $ . 



Two males and three females were obtained by Mr. Green. Hum- 

 bert's species was based upon a single female specimen which was also 

 captured at Pundel-Oya. As this author pointed out, this species is 

 very closely related to his Str. shinneri, and the differential charac- 

 ters he was able to give were of doubtful value seeing that members 

 of different sexes were being compared. Mr. Green's discovery of the 

 male has, however, settled the point, and has clearly shown that the 

 two species are in reality distinct, although very closely allied. Thus 

 the male of 8t. cingalense has the same peculiar process on the ster- 

 num of the 5th somite, and its copulatory feet are very like those of 

 8t. skinneri. In St. skinneri, however, according to Humbert's figure 

 and from a specimen of this species in the Museum collection, the 

 two slender pieces of the copulatory apparatus are as long as the median 

 laminate piece, and there is a distinct small basal process. Whereas 

 in St. cingalense there is no small basal process, and the slender pieces 

 are shorter than the central lamina, which is itself differently "cleft. 



